I need help with a smw RomHack that I don't remember.

So I'm practically new to Reddit in general, and I entered this sub-reddit to ask if anyone knows anything about a romhack (I think from smw or a similar one) in which there were like multiple different games (if I remember correctly all from Nintendo) in a crossover so to speak. All in 2d, it's not sm64 In The Multiverse or anything similar. I'm also non-english so sorry if i do a typo.